It looks like a copying the file from http://sourceforge.net/project/showfiles.php?group_id=129083&package_id=187875 into /lib/firmware/zd1211 fixes the problem.
Those files seems to be identical to the files in /lib/firmware/2.6.17-7-generic/zd1211* (that are already installed), just different names. ** Changed in: linux-source-2.6.17 (Ubuntu) Status: Unconfirmed => Confirmed -- zd1211 no longer working (missing firmware?) https://launchpad.net/bugs/58259 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs